Preheat your air fryer to 400°F and lightly coat the basket with a small amount of avocado oil.
Place the chicken breast in a shallow bowl with the buttermilk, ensuring it is fully coated and let it sit for 10 minutes.
In a separate bowl, whisk together the almond flour, arrowroot starch, garlic powder, onion powder, paprika, salt, and pepper.
Dredge the buttermilk-soaked chicken into the flour mixture, pressing firmly to create a thick, even crust on all sides.
Place the chicken and the broccoli florets in the air fryer basket, misting the tops with the remaining avocado oil.
Cook for 12-15 minutes, flipping the chicken halfway through, until the coating is golden brown and the chicken is cooked through.